Extendable wash brush



FIG. 1 is a perspective view of the wash brush;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a front end elevational view thereof;

FIG. 5 is a rear end elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The portions shown in broken lines are for illustrative purposes and form no part of the claimed design. 

The ornamental design for an extendable wash brush, as shown and described. 